RCM for the Construction of Novel Steroid-like Polycyclic Systems. 1. Studies on the Synthesis of a PreD<sub>3</sub>-D<sub>3</sub> Transition State Analogue
作者:Rebeca García-Fandiño、María José Aldegunde、Eva M. Codesido、Luis Castedo、Juan R. Granja
DOI:10.1021/jo050568w
日期:2005.10.1
systems containing eight-membered carbocycles constitute a large class of compounds of importance in organic chemistry, biology, and medicine. Here we describe a new strategy by which complex polycyclic steroid-like systems can be constructed on the steroid CD framework, by a combination of RCM and Heck cyclizations. The method is exemplified by its application to the stereoselectivesynthesis of 6-8-6
[EN] MACROCYCLES AS FACTOR XIA INHIBITORS<br/>[FR] MACROCYCLES UTILISÉS EN TANT QU'INHIBITEURS DU FACTEUR XIA
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2011100401A1
公开(公告)日:2011-08-18
The present invention provides compounds of Formula (I): or a stereoisomer, a tautomer, or a pharmaceutically acceptable salt thereof, wherein all the variables are as defined herein. These compounds are selective Factor XIa inhibitors or dual inhibitors of fXIa and plasma kallikrein. This invention also relates to pharmaceutical compositions comprising these compounds and methods of treating thromboembolic and/or inflammatory disorders using the same.
A Ring‐Closing Metathesis Approach to Cyclic α,β‐Dehydroamino Acids
作者:Koen F. W. Hekking、Dennis C. J. Waalboer、Marcel A. H. Moelands、Floris L. van Delft、Floris P. J. T. Rutjes
DOI:10.1002/adsc.200700308
日期:2008.1.4
the synthesis and ring-closingmetathesis (RCM) of α,β-dehydroamino acids is described. This sequence has led to the formation of a range of biologically relevant functionalized nitrogen heterocycles. The incorporation of chiral building blocks in the RCM precursors eventually resulted in the formation of optically active 4-substituted cyclic dehydroamino acids. In addition, olefin isomerization under
The addition of a precisely positioned chiralcenter in the tether of a constrained peptide is reported, yielding two separable peptide diastereomers with significantly different helicity, as supported by circular dichroism (CD) and NMR spectroscopy. Single crystal X‐ray diffraction analysis suggests that the absolute configuration of the in‐tetherchiralcenter in helical form is R, which is in agreement
The Synthesis, Structural Characterisation, and Chemoselective Manipulation of Certain Functionalised Cyclic Sulfates Derived from Chiral, Non-Racemic, and Polysubstituted Bicyclo[2.2.2]octane-2,3-diols
作者:Martin G. Banwell、Antony L. Crisp、BoRa Lee、Ping Lan、Hannah E. Bollard、Jas S. Ward、Anthony C. Willis
DOI:10.1071/ch21140
日期:——
Certain cyclic sulfates (e.g. 23) together with various of their precursor sulfites (e.g. 21 and 22) have been prepared from the corresponding chiral, non-racemic bicyclo[2.2.2]octane-2,3-diols (e.g. 20). Such diols are obtained by engaging the corresponding enzymatically derived and enantiomerically enriched or homochiral cis-1,2-dihydrocatechol (e.g. 10) or certain derivatives in either inter- or